Katharine R. Kolb Tara A. Gross Jonathan W. Musser Taylor H. Rowley 20211213 vector digital data https://doi.org/10.5066/P9VGNFBO Reliable peak-streamflow information is critical for proper design of stream-related infrastructure, such as bridges, and StreamStats provides a user-friendly interface to estimate peak flows (https://streamstats.usgs .gov/ss/). StreamStats develops these peak-flow estimates using basin characteristics for the entire contributing area to a user-selected point; however, infrastructure planners often need to estimate flows for an area downstream from a known control such as a reservoir release or a weir. This dataset was compiled in cooperation with the South Carolina Department of Transportation (SCDOT) to provide a Geographic Information System (GIS) layer of filtered regulation points from the U.S. Army Corps Engineers (USACE) National Inventory of Dams and upstream basin polygons for those points, for use within the South Carolina StreamStats client application. A select few characteristics were computed for each basin in the polygon dataset to enable the application to estimate flows above and below each regulation point and better assist SCDOT personnel when designing new or revising existing stream-related infrastructure. These data provide the basin polygons upstream from regulation points on streams in South Carolina as well on streams in basins that can be delineated from South Carolina’s StreamStats application. Characteristics determined for these basins enable South Carolina StreamStats to estimate flows above and below each regulation point. 2021 publication date Complete None planned -83.7411 -78.3897 36.6742 32.1612 Alexandria Digital Library Feature Type Thesaurus bridges dam sites USGS Thesaurus watershed management USGS Metadata Identifier USGS:6154b7aed34e0df5fb9d8c97 None South Carolina Georgia North Carolina Region 1 Region 2 Region 3 Region 4 Region 5 None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Katharine Kolb U.S. Geological Survey, Southeast Region Geographer mailing address

810 Tyvola Rd

Charlotte NC 28217 US 704-790-2612 704-790-2607 kkolb@usgs.gov South Carolina Department of Transportation Data are provided in shapefile format and may be opened using ESRI or other geospatial information system software packages. Data were processed using ESRI ArcGIS Pro (https://pro.arcgis.com/en/pro-app/latest/get-started/get-started.htm) version 2.6. Verified that attribute values were within expected bounds. See specific metadata themes for more details. No logical consistency report was done. This dataset includes only basins for dams with a drainage area of at least 1 square mile and found in South Carolina or in adjacent states and within basins that can be delineated from South Carolina’s StreamStats application. A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. A formal accuracy assessment of the vertical positional information in the dataset has either not been conducted, or is not applicable. U.S. Army Corps of Engineers 2020 tabular digital data https://nid.usace.army.mil/ Digital and/or Hardcopy 1700 2018 publication date National Inventory of Dams Source information used in support of the development of the dataset. Toby D. Feaster Anthony J. Gotvald J. Curtis Weaver 20090901 publication https://pubs.usgs.gov/sir/2009/5156/ Digital and/or Hardcopy 2006 publication date Hydrologic Regions in South Carolina Source information used in support of the development of the dataset. Site list was filtered to include only dams with a drainage area of at least 1 square mile and located within South Carolina as well as a few dams in adjacent states within basins that could be delineated by the South Carolina StreamStats application. Dam points in South Carolina were snapped to the South Carolina StreamStats str900 raster dataset, dam points in Georgia were snapped to the Georgia StreamStats str900 raster dataset, and dam points in North Carolina were snapped to the North Carolina StreamStats str900 raster dataset. In cases where multiple points exist for a single structure, a single point was chosen based on water outflow. Str900 datasets can be obtained by contacting the data originator. 2021 Basins were delineated from the filtered selection of dam points using South Carolina StreamStats GIS data layers at 30 foot resolution with the South Carolina State Plane, North American Datum of 1983, International Feet projection. GIS data layers can be obtained by contacting the data originator. 2021 Characteristics were generated for each basin using South Carolina basin characteristic rasters for all, regardless if the basin extended into Georgia or North Carolina. The following basin characteristics were computed using the Spatial Statistics Zonal Statistics as Table tool in ArcGIS Pro version 2.6 (Esri, 2021); DRNAREA (drainage area), LC06DEV (Percent of land use from NLCD 2006 classes 21-24), LC06IMP (Percent imperviousness of basin area 2006 NLCD), PCTREG1 (Percent of area covered by hydrologic region 1), PCTREG2 (Percent of area covered by hydrologic region 2), PCTREG3 (Percent of area covered by hydrologic region 3), PCTREG4 (Percent of area covered by hydrologic region 4), and PCTREG5 (Percent of area covered by hydrologic region 5). Basin characteristic rasters can be obtained by contacting the data originator. 2021 Vector G-polygon 1152 State Plane Coordinate System 1983 3900 32.5 34.83333333333334 -81.0 0.0 2000000.0 0.0 coordinate pair 0.6096 0.6096 International feet North_American_Datum_1983 GRS_1980 6378137.0 298.257222101 dam_watersheds.shp Attribute Table Table containing attribute information associated with the data set. Producer Defined FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the polygon features. Name National Inventory of Dams ID IDs were supplied by National Inventory of Dams IDs were assigned by National Inventory of Dams DRNAREA Drainage area in square miles Producer Defined 1.0 14700.0 LC06DEV Percentage of land use from NLCD 2006 classes 21-24 accessed at https://www.mrlc.gov/data/nlcd-2006-land-cover-conus Producer Defined 0.0 98.8 LC06IMP Percentage of imperviousness of basin area 2006 NLCD accessed at https://www.mrlc.gov/data/nlcd-2006-land-cover-conus Producer Defined 0.0 37.4 PCTREG1 Percent of area covered by hydrologic region 1 Producer Defined 0.0 100.0 PCTREG2 Percent of area covered by hydrologic region 2 Producer Defined 0.0 100.0 PCTREG3 Percent of area covered by hydrologic region 3 Producer Defined 0.0 100.0 PCTREG4 Percent of area covered by hydrologic region 4 Producer Defined 0.0 100.0 PCTREG5 Percent of area covered by hydrologic region 5 Producer Defined 0.0 0.0 Shape_Leng Feature perimeter Producer Defined 28260.0006562 6312419.99672 International feet Shape_Area Feature area Producer Defined 27981899.9803 409307382000.0 Square feet U.S. Geological Survey GS ScienceBase mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Digital Data https://doi.org/10.5066/P9VGNFBO None. No fees are applicable for obtaining the dataset. 20211213 Tara A Gross U.S. Geological Survey, ROCKY MOUNTAIN REGION IT Specialist mailing address

Mail Stop 415, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-6933 303-236-4912 tgross@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998